Instead of giving up altogether, I suggest a different approach: choose your enemies and compartmentalize your personal data. Stuff related to your personal li

Instead of giving up altogether, I suggest a different approach: choose your enemies and compartmentalize your personal data. Stuff related to your personal life and your feelings? You probably can't keep it from the NSA, but you can keep some of it from Google and Facebook. Super secret work stuff (think airplane parts, not stealth mobile app startups)? Cryptography and all kinds of misdirection to throw off spies. When Google knows a lot about me, it knows what cuisines I like, so when I search for "restaurant" it can return search results for restaurants I might like... except I could have searched for "<cuisine> restaurant in <place>" and the results would be good enough. Current returns are too marginal and my own judgement is often better; future hypothetical returns may be matched by improvements that don't require so many privacy invasions — specialized search engines, for instance.